Warp drawing in machine



July 19, 1955 c. B. CRANDALL WARP DRAWING IN MACHINE 4 Sheets-Sheet 1 Filed Oct. 19, 1953 ATTORNEYS July 19, 1955 s. CRANDALL WARP DRAWING IN MACHINE 4 Sheets-Sheet 2 Filed Oct. 19, 1953 INVENTOR. Char/es B. Crandfl/ BY 0 1 6: Md (U vf ATTORNEYS y 1955 c. B. CRANDALL 2,713,192

WARP DRAWING IN MACHINE Filed Oct. 19, 1953 4 Sheets-Sheet 3 INVENTOR. Char/e5 B. Crandal/ ATTORNEYS y 19, 1955 c. B. CRANDALL 2,713,192

WARP DRAWING IN MACHINE Filed Got. 19, 1953 4 Sheets-Sheet 4 INVENTOR. Char/65 B. Crane/0 BY MI 621 JLJLAJJ HQ ATTORNEYS United States Patent WARP DRAWING IN MACHINE Charles B. Crandall, Rockford, IlL, assignor to Barber- Coiman Company, Rockford, ILL, a corporation of Illinois Application October 19, 1953, Serial No. 386,697

Claims. (Cl. 28-44) This invention relates to machines for drawing in warp and, more particularly, to a machine in which the terminal threads of a sheet of warp are separated by a selector mounted on a warp rod which is turned to advance the separated threads for successive engagement by the needle that draws the threads through the weaving elements. In such a machine, the warp rod and hence the selector is turned at predetermined intervals in response to a pattern control device which serves to engage and disengage a clutch in the drive for the warp rod.

Occasionally, a selector picks up two threads at a time and, to correct this, one thread is separated from the other and manually placed in the needle. While the needle is drawing in this thread, the selector is prevented from turning so that the threads held thereby are not advanced and thus are in proper position for continuing with automatic operation in the ensuing stroke of the needle.

The present invention aims to provide in a drawing in machine a novel means for causing the selector to remain idle while the extra thread is drawn in whereby the thread may be placed in the needle and the selector stopped by a simple and rapid operation which does not materially reduce the speed of drawing in the warp sheet and which does not destroy the timing of the machine.

Accordingly, the principal object is to cause the selector to remain idle by momentarily moving a manually operable member Which is located near the selector and the needle and which disengages a clutch in the drive for the warp rod thus overriding the effect of the pattern control device.

A more detailed object is to construct and arrange the manual member to operate the same clutch controlled by the pattern control device and to disengage this clutch even though the pattern control device is conditioned to cause engagement of the clutch.

Other objects and advantages of the invention will be- I come apparent from the following detailed description taken in connection with the accompanying drawings, in which Figure 1 is a fragmentary front elevation of a drawing in machine embodying the novel features of the present invention.

Fig. 2 is a sectional view taken along the line 2-2 in Fig. 1.

Fig. 3 is a fragmentary sectional view taken along the line 33 in Fig. 2.

Fig. 4 is a fragmentary plan view of the machine with parts broken away and shown in section.

Fig. 5 is a fragmentary sectional view taken along the line 55 in Fig. l. i

Fig. 6 is a fragmentary view with parts broken away of the clutch for disengaging the warp rod from its drive.

Fig. 7 is a fragmentary end view of the machine.

While the invention is applicable to various types of drawing in machines, it is shown herein embodied in a machine for drawing a leased warp whose threads 10 alternately pass on opposite sides of an elongated horizontal warp rod 11 and then are crossed to pass around the opposite sides of a second parallel rod 12 disposed above the first (see Fig. 7). Mounted on one end of the warp rod 11 is a selector 13 which, when the rod is oscillated, separates the terminal threads from the warp sheet so that the end thread is in position to be engaged by a needle 14. The latter reciprocates along a path perpendicular to the warp sheet and draws the end threads through the weaving elements, that is, the drop wires, the heddles, and the reed. Preferably, a second pair of rods 11 and 12 (Fig. 7) are disposed behind the first pair so that the selector 13' on the warp rod 11 separates the threads 10 of a second leased warp sheet which also is drawn in by the needle 14. With this arrangement, each warp rod oscillates a predetermined number of times, depending on the pattern desired, while the other remains idle and thus threads from each warp sheet are drawn separately through the weaving elements according to a predetermined pattern.

The Warp sheets are supported and clamped in place on an elongated horizontal frame 15 while the needle 14 and the rods 11, 12, 11' and 12' along with the various operating mechanisms therefor are mounted on a carriage 16 whose wheels 17 ride on a track 18 extending horizontally along the frame and transversely of the warp threads. At the ends adjacent the needle, the rods are journaled in a bracket 19 (Fig. 7) projecting from the back of an upright post 2i) on the carriage while the other ends are suitably supported by posts 21 and 22. During the drawing in operation, the carriage 16 is advanced from left to right as viewed in Fig. 1 by a suitable drive (not shown), the rate of advance being correlated with the operation of the needle 14 to position the selectors 13 and 13' properly relative to the portions of the warp sheets not yet drawn in.

Each of the warp rods 11 and 11' is driven from a shaft 23 jonrnaled in a bushing 24 on the carriage 16 and turned continuously by a suitable mechanism '(not shown) through helical gears 25 from a second shaft 26 bushed on the carriage. In the case of the warp rod 11, a spur gear 27 on the shaft 23 meshes with a gear 28 connected to the driving element 29 (Fig. 5) of a one revolution clutch 30 which, when engaged, turns the warp rod through one cycle. Herein, this clutch is of the one revolution type and includes a driven element 31 which turns a hollow shaft 32 through gears 33. The hollow shaft, in turn, acts through gearing 34 to turn the rod 12 which carries an eccentric 35 (Fig. 5) for rocking a sector gear 36 about bits pivot 37} The end of the Warp rod remote from the selector 13 projects through the hollow shaft 32 and carries a pinion 38 meshing with the sector gear 36 which thus imparts an oscillating motion to the rod.

As shown in Figs. 5 and 6, the driving element 29 of the clutch 30 is in the form of a disk having a peripheral notch 39 which receives the nose-like portion 40 of a dog 41 pivotally mounted on the driven disk 31. The dog 41 is urged toward the periphery of the driving disk by a torsion spring 42 but is held back out of engagement with the notch 39 and against a stop pin 43 on the driven disk by a finger 44 engaging an arm 45 projecting radially from the dog. The finger 44 is fast on a rock shaft 46 which is journaled on the carriage 16 and which, when turned, swings the finger back to permit the dog nose 40 to enter the notch 39 thus engaging the clutch.

The warp rod 11' is oscillated by a similar mechanism the corresponding parts of which bear the same but primed reference characters. i

To oscillate the warp rods 11 and 11 at selected intervais in accordance with the desired pattern, the clutches 39 and 38' are engaged and disengaged under the action of a pattern control device 47 (Fig. 4)"whi ch causes one rod to oscillate While the other remains idle. Herein,

by the pattern sheet.

the pattern is in the form of a sheet 48 wrapped around a perforated drum 49 and punched with holes. As is well known in the art, the drum is shifted back and forth as by a suitable cam (not shown) acting through a rocker arm 51 -on which the drum is supported and each time thefdrum moves forward,'the pattern sheet selects, en-

gages and advances selected ones of a plurality of elongated. feeler rods 52, 52', 52", 52", et cetera.

Each of the feeler rods controls one of the various mechanisms which determine the pattern to be drawn in.

The rods 52 and 52' serve to cause engagement of the clutches 30 and 30 respectively, while the remaining rods 52", 52" control the weaving elements. The feeler rod 52' supports a cam block 53 (Fig. v) having an inclined surface 54' engaged by a follower 55 which is carried on the outer end of an arm'56 fast on the rock shaft 46. Asa result, when the rod moves iforward, the rockshaft is turned clockwise as viewed in Fig. 5 swinging the finger '44 out of engagement with the dog 41'. This permits the nose'40 of the dog to enter the notch 39' so that the driven element 31 of the clutch 30. turns with the driving element 29. Before the clutch completes one revolution, the drum 49 is retracted and advanced again. Should the pattern'require another thread from the sheet controlled by the same 'warp rod 11' and selector 13', the

feeler rod 52' again is advanced thus swinging the finger 44' permitting a second revolution of the clutch. On the other hand, if a thread 10 from the other sheet is to be drawn in, the'feeler rod 52 is not advanced a second time so that the finger 44 engages the dog 41' to swing the latter out of the notch 39 and disengage the clutch 30. In such a case, the feeler rod 52 is advanced to engage the clutch '30 through ,a similar mechanism indicated by 'threads are not advanced and thus are arranged properly in the selector for the resumption of automatic operation. To'facilitate drawing in the extra thread, the present invention contemplates the provision of a novel means for disengaging the warp rods 11 and 11 from'their respective drives without materially slowing the operation of the machine and Without the danger of destroying the timing of the machine. Ipoint adjacentthe needle where the operator stands while separating the extra thread and herein comprises two manually movable members 57 and 57' (Fig. 1), one

This means is operable from a for each warp rod, mounted on the carriage 16 above the needle; Each member is operatively associated with a clutch which is interposed in the drive for the correspondingwarp rod and which is responsive to movement of a the. member to disengage the rod from its drive for a single cycle of the machine irrespective of the operation of the pattern sheet 48;

While the members 57 and 57 may operate clutches separate from those controlled by the pattern sheet 48,

advantage is taken in the present instance of the onerevolution'characteristic of the clutches 30 and 30" to utilize these clutches for disengaging the warp rods 11 and 11' from their drives while the extra thread is drawn in. For this purpose, the members 57 and 57' override the control of the pattern sheet by acting through the dogs 41 and'41' and each is operable to hold its dog in the inactive or retracted posin'on even though the corresponding feeler rod has been advanced In the case of the clutch 30, this is. achieved by a finger 58 (Figs. 5 and 6) which, when the'member 57 is moved, engages the arm of the dog 41 and prevents the latter from swinging into the notch 39. irrespective of whether the finger 44 has re leased the dog. Herein,- the finger 58 is mounted loosely *notch again is in position to receive the dog.

on the rockshaft 46 alongside the finger 44 and normally is held back'out of engagement'with the dog by'a contractile spring 59 acting between a pin 60 on the finger and a post 61 upstanding from the carriage 16.

In the form illustrated, the members 57 and 57 are push buttons on the upper ends of vertical bars 62 and 62' extending down through the post 20. At its lower end, the bar 62 abuts against an arm 63 .(Fig. 7) secured to an elongated rockshaft 64 journaled 0n the carriage 16. The rockshaft extendshorizontally in under the clutch 30 at which point an operating arm 65 fast on the shaft projects up behind the finger 58. Thus, when the push button 57"is depressed, the shaft 64 is rocked swinging the arm 65 against the finger 58 which is moved into engagement with thedog 41. Similarly, the bar 62' engages an arm 63' on one end of a hollow shaft 64' encircling the shaft 64 while an operating arm 65' on the opposite end of the shaft rocks the finger 58' in over the arm 45 of the dog 41.

In operation, the vwarp rod 11 under the control of the pattern sheet 48 oscillates a predetermined number of times while the warp rod11' is idle and then the latter oscillates while the former remains idle. If, during the oscillation of the rod 11, the selector 13 should pick up two threads simultaneously both threads will be presented to the needle 14 at the same time. Tocorrect this, the operator merely removes the leading thread from the selector and places it in the needle while, at

the same time, depressing the push button 57. As a result, the extra thread is drawn in during the ensuing stroke of the needle but, sincev the clutch 30 is disengaged, the warp rod 11 is idle and the selector 13 does not advance the threads 10 even though the feeler rod 52 has been advanced by the pattern sheet 48. Such disengagement of the clutch compensates for the presence of the extra threads and thus the succeeding threads are disposed properly in the selector for the resumptionof automatic operation.

The push button 57 is depressed only momentarily and Q then released. This permits the notch 39 to turn beyond the nose 40 of the dog 49 so that the driving member 29 of the clutch 30 makes one revolution before the Upon completion of this revolution in which the warp rod 11' is idle, the operating arm 65 has released vthe dog 41 which thus is returned to the control of the pattern sheet. Accordingly, the warp rod either oscillates or remains idle during the next, cycle depending upon the pattern. engaged by the push button 57' if the selector 13' picks up two threads at a time.

With the. arrangement described above, the extra 7 thread may be placed in the needle 14 and themachine conditioned to resume automatic operation by two simple manual motions, that is, separating the doubled threads and depressing one of the push buttons 57 and 57.. The

are properly disposed relative to the other operating parts after being disengaged from their drive s.

Thus, the

operation of the push buttons 57 and 57' does not disturb the timing of the machine. 1 7 I claim as my invention: 1. In a drawing in machine, the combination of, a

frame adapted to support a warp sheet, a carriage mount 6 ed on said frame for movement transversely of the threads of said sheet and adapted to support weaving elements through which the threads are drawn, an elongated warp rod mounted on and extending along said'carriage to engage said sheet and having a picking element at one end In the same way, the clutch 30' may be,dis-

Because of the thereof to separate the terminal thread of the sheet, a reciprocating needle mounted on said carriage adjacent said element to engage said terminal thread and draw the same through the Weaving elements, driving means operable to turn said rod and including a one revolution clutch, in actuator operable when moved to an active position to engage said clutch to turn said rod, pattern control means connected to said actuator to move the member selectively into and out of said active position and engage and disengage said clutch at predetermined intervals, a manually operable member mounted on said carriage adjacent said needle, and a connection between said member and said actuator operable when the member is moved to hold the actuator away from said active position irrespective of said pattern control means.

2. A drawing in machine having, in combination, a frame adapted to support a Warp sheet, a carriage mounted on said frame for movement transversely of the threads of said sheet, a reciprocating needle mounted on said carriage to engage and draw in the terminal thread of said sheet, an elongated warp rod extending along said carriage and having a picking element adjacent said needle and operable to separate said terminal thread for engagement by the needle, 21 driver, clutch means connecting said driver and said rod, pattern control mechanism operable at predetermined intervals to engage said clutch means thereby to turn said rod, a manually operable member mounted on said carriage adjacent said needle, and a connection between said member and said clutch means opea able in response to said member to disengage said clutch means and cause said rod to remain idle irrespective of said pattern control mechanism.

3. In a warp drawing in machine, the combination of, drive means including a normally disengaged one revolution clutch, an actuator urged toward an active position and operable when in said position to engage said clutch, a pattern control device, a first finger engaging said actuator to hold the same away from said active position and movable in response to said device to release said actuator at selected intervals to engage said clutch, a warp rod connected to the driven element of said clutch for turning when the clutch is engaged, a second finger normally disposed away from said actuator, and a manually movable member connected to said second finger and operable to move the latter into engagement with said actuator to hold the actuator away from said active position and cause said rod to remain idle irrespective of the position of said first finger.

4. A Warp drawing in machine having, in combination, an elongated warp rod, driving means operable to turn said rod and including a clutch operable when engaged to turn said rod through a cycle, a member movable be tween active and inactive positions and operable in said active position to engage said clutch, pattern control mechanism connected to said member to move the same to said active position at selected intervals, a manually movable element, and a connection between said element and said member operable when the element is moved to hold said member in the inactive position and cause said rod to remain idle irrespective of said pattern control mechanism.

5. In a warp drawing in machine, the combination of, an elongated Warp rod, a driving member, a connection between said rod and said member including clutch means operable when engaged to turn said rod, pattern control mechanism operable to engage said clutch means selectively thereby to turn said rod at predetermined intervals, a manually actuated element, and a connection between said element and said clutch means responsive to said element to disengage said clutch means and cause said rod to remain idle irrespective of said pattern control mechmsrn.

References Cited in the file of this patent UNETED STATES PATENTS 355,221 Sherman Dec. 28, 1886 1,292,175 Ward Jan. 21, 1919 2,654,138 Drake Oct. 6, 1953 

